test/gopls/testdata: update workspace testdata configuration

useLanguageServer is true by default.
go.toolsManagement.checkForUpdates is the new setting to
control gopls version check behavior.

Change-Id: Iba4c60935b8376ac7c77bfbf3f6922aeb98bf319
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/402954
Reviewed-by: Suzy Mueller <suzmue@golang.org>
diff --git a/test/gopls/testdata/src/workspace/.vscode/settings.json b/test/gopls/testdata/src/workspace/.vscode/settings.json
index 2474ded..974aa52 100644
--- a/test/gopls/testdata/src/workspace/.vscode/settings.json
+++ b/test/gopls/testdata/src/workspace/.vscode/settings.json
@@ -1,5 +1,4 @@
 {
-	"go.useLanguageServer": true,
 	"go.languageServerFlags": ["-rpc.trace", "serve"],
-	"go.useGoProxyToCheckForToolUpdates": false,
+	"go.toolsManagement.checkForUpdates": "off"
 }
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